CPC Subgroup Additional Only
B01D 2239/04 Additives and treatments of the filtering material
Full Title
Aspects relating to filtering material for liquid or gaseous fluids > Additives and treatments of the filtering material
8 direct subcodes
Child Classifications
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- B01D 2239/0407 comprising particulate additives, e.g. adsorbents
- B01D 2239/0414 Surface modifiers, e.g. comprising ion exchange groups
- B01D 2239/0435 Electret
- B01D 2239/0442 Antimicrobial, antibacterial, antifungal additives
- B01D 2239/045 Deodorising additives
- B01D 2239/0457 Specific fire retardant or heat resistant properties
- B01D 2239/0464 Impregnants
- B01D 2239/0471 Surface coating material